Needed to boost the immune system and protect against free radical damage. Very effective at protecting against and fighting symptoms of the common cold, Zinc is an essential trace mineral vital for the normal functioning of many body processes, 75% of Zinc is found in bones, muscles and skin. It is vital for the healthy functioning of over 200 enzymes. Zinc is needed to promote proper growth, have a healthy development of the sexual organs, including boosting testosterone production and promoting healthy sperm production. It is vital in maintaining a healthy prostate in men. Many athletes and sports people use zinc supplement because excessive perspiration can reduce the levels of zinc retained by the body. The average diet is lacking in Zinc, a supplimentation of between 15-25mg can help prevent a deficiency. Low levels of Zinc can result in loss of taste, poor appetite and hair growth. White spots on the nails can be alleviated by taking Zinc supplement. Excessive amounts of Zinc over (300mg) can lead to nausea.